Higgs boson decay to charmonia via c-quark fragmentation

A bstract We calculate the decay branching fractions of the Higgs boson to J / ψ and η c via the charm-quark fragmentation mechanism for the color-singlet and color-octet states in the framework of non-relativistic QCD. The decay rates are governed by the charm-quark Yukawa coupling, unlike the deca...

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Bibliographic Details
Published in:The journal of high energy physics 2022-08, Vol.2022 (8), p.73-21, Article 73
Main Authors: Han, Tao, Leibovich, Adam K., Ma, Yang, Tan, Xiao-Ze
Format: Article
Language:English
Subjects:
Charm (particle physics)
Classical and Quantum Gravitation
Color
Coupling
Decay rate
Elementary Particles
Fragmentation
Higgs bosons
Higgs Properties
High energy physics
Large Hadron Collider
Luminosity
Particle decay
Particle physics
Physics
Physics and Astronomy
Quantum chromodynamics
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Quarkonium
Quarks
Regular Article - Theoretical Physics
Relativity Theory
String Theory
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Summary:A bstract We calculate the decay branching fractions of the Higgs boson to J / ψ and η c via the charm-quark fragmentation mechanism for the color-singlet and color-octet states in the framework of non-relativistic QCD. The decay rates are governed by the charm-quark Yukawa coupling, unlike the decay H → J / ψ + γ , which is dominated by the γ ∗ - J / ψ mixing. We find that the decay branching fractions can be about 2 × 10 − 5 for H → c c ¯ + J / ψ , and 6 × 10 − 5 for H → c c ¯ + η c . We comment on the perspective of searching for the Higgs boson to J / ψ transition at the High-Luminosity LHC for testing the charm-quark Yukawa coupling.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP08(2022)073